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| Chapter 8: Troubleshooting |
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LED1 | LED2 | LED3 | LED4 | Meaning |
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On | Off | On | Off | Remote Alarm Indication (RAI). Your |
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| ISDN provider has synchronization |
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| problems and is reporting this problem |
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| to you. |
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On | Off | Off | On | Your E1/PRI line does not support |
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| CRC4 functionality. Deselect the CRC4 |
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| option. (See Setting Up ISDN Port |
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Off | Off | Off | Off | No electrical signal is on the E1/PRI |
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| line. Make sure your cable is plugged in |
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| correctly. |
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E1/PRI Interface Without CRC4
On cards with an E1/PRI interface and no CRC4 (France), the LEDs for each port function as follows:
LED | Color | Meaning when the LED is ON... |
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1 | Green | Clock is synchronized. |
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2 | Green | Physical layer is active. |
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3 | Yellow | Your ISDN provider is sending an RAI alarm to the |
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| board. |
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4 | Red | No meaning. |
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In their operational state, the LEDs are as follows:
LED | Color State must be... |
1 Green On
2 Green On
3 Yellow Off
5536 PRI RAS Communications Controller Users Guide | 121 |